Concentration and fractionation of small particles in liquid by ultrasound

Kenji Yasuda, Shin Ichiro Umemura, Kazuo Takeda

研究成果: Article査読

123 被引用数 (Scopus)

抄録

The efficacy of the ultrasonic standing plane wave in concentrating small particles was theoretically evaluated and compared with experimental results. Acoustic energy density was estimated by measuring the ultrasonic absorption, and particle distribution was observed by dark-field microscopy. The theory predicts that diffusion is negligible in concentrating polystyrene spheres larger than 5 µ m in diameter when they are subjected to 2 J/m3 ultrasound. The half-width of the steady-state particle distribution was of the same order of magnitude as the theoretical value for the particles of 1 µm and 2 µm diameter. We also applied this concentrating technique to fractionation of polystyrene spheres 10 µ m in diameter, and more than 90% of the particles in the laminar flow were successfully collected.

本文言語English
ページ(範囲)2715-2720
ページ数6
ジャーナルJapanese journal of applied physics
34
5S
DOI
出版ステータスPublished - 1995 5月
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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